137720147 has 6 divisors (see below), whose sum is σ = 139491828. Its totient is φ = 135970692.

The previous prime is 137720123. The next prime is 137720153. The reversal of 137720147 is 741027731.

It is not a de Polignac number, because 137720147 - 2¹⁸ = 137458003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137720347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4793 + ... + 17274.

It is an arithmetic number, because the mean of its divisors is an integer number (23248638).

Almost surely, 2^137720147 is an apocalyptic number.

137720147 is a deficient number, since it is larger than the sum of its proper divisors (1771681).

137720147 is an frugal number, since it uses more digits than its factorization.

137720147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22225 (or 22146 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 137720147 is about 11735.4227448354. The cubic root of 137720147 is about 516.4153694804.

Adding to 137720147 its reverse (741027731), we get a palindrome (878747878).

The spelling of 137720147 in words is "one hundred thirty-seven million, seven hundred twenty thousand, one hundred forty-seven".